The crystal structure of C₁₂OH₂₀ (lR-6R-4R-2 R-3,7,7-trimethyl-4-(2-hydroxyethyl) bicyclo [4.1.0] hept-2-ene) has been determined by X-ray diffraction. The compound crystallizes in space group P2₁2₁2₁ witha = 5.893(1),b = 22.572(2), c = 26.164(3) Å,V = 3480.3 Å₃, Z= 12. The structure was solved by modified direct methods and refined to anR value of 0.081 for 607 unique reflections. Each asymmetric unit has three molecules which are held together through intermolecular hydrogen bonds resulting in a novel spiral-type arrangement of molecules. The six-membered ring has a half-chair conformation.

Room temperature reactions of [Fe₂(CO)₆(μ -Se₂)] with the diacetylenes, RC≡ CC≡ CH(R = Me, n-Bu) yield the products, [(CO)₆Fe₂{μ-SeCC(H)C(R)SeCSe}]; X-ray analysis of the R = Me compound has been carried out and reveals an unusual cyclisation of the diacetylene with incorporation of a selenium atom to form a cyclic C₄Se ligand attached to the Fe₂(CO)₆Se₂ core.

A series of fifteen diversified N-benzylpiperidin-4-one oximes were synthesized and characterized by their NMR spectral data. Additionally, single-crystal XRD analysis was performed for the representative symmetrically and unsymmetrically substituted molecules. All the synthesized oximes from unsymmetrical ketones existed as E-isomer as witnessed by their NMR and XRD data. Among the synthesized target compounds that evaluated for their in vitro cytotoxicity against human cervical carcinoma (HeLa) cells, five compounds were potent with IC₅₀ < 17 𝜇M. 1-Benzyl-2,6-bis(4-isopropylphenyl)-3-methylpiperidin-4-one oxime 3c with an IC₅₀ of 13.88 𝜇M was found to be the best active compound as depicted by the microscopic analysis.